kolibrios/programs/develop/oberon07/Lib/Linux32/API.ob07

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(*
Copyright 2016 Anton Krotov
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*)
MODULE API;
IMPORT sys := SYSTEM;
TYPE
TP* = ARRAY 2 OF INTEGER;
VAR
Param*: INTEGER;
sec* : INTEGER;
dsec* : INTEGER;
stdin* : INTEGER;
stdout* : INTEGER;
stderr* : INTEGER;
dlopen* : PROCEDURE [cdecl] (filename, flag: INTEGER): INTEGER;
dlsym* : PROCEDURE [cdecl] (handle, symbol: INTEGER): INTEGER;
_malloc* : PROCEDURE [cdecl] (size: INTEGER): INTEGER;
free* : PROCEDURE [cdecl] (ptr: INTEGER);
fopen* : PROCEDURE [cdecl] (fname, fmode: INTEGER): INTEGER;
fclose*, ftell* : PROCEDURE [cdecl] (file: INTEGER): INTEGER;
fwrite*, fread* : PROCEDURE [cdecl] (buffer, bytes, blocks, file: INTEGER): INTEGER;
fseek* : PROCEDURE [cdecl] (file, offset, origin: INTEGER): INTEGER;
exit* : PROCEDURE [cdecl] (code: INTEGER);
strncmp* : PROCEDURE [cdecl] (str1, str2, n: INTEGER): INTEGER;
strlen* : PROCEDURE [cdecl] (str: INTEGER): INTEGER;
clock_gettime* : PROCEDURE [cdecl] (clock_id: INTEGER; VAR tp: TP): INTEGER;
PROCEDURE [stdcall] zeromem* (size, adr: INTEGER);
BEGIN
sys.CODE("578B7D0C8B4D0833C09CFCF3AB9D5F")
END zeromem;
PROCEDURE Align(n, m: INTEGER): INTEGER;
RETURN n + (m - n MOD m) MOD m
END Align;
PROCEDURE malloc* (Bytes: INTEGER): INTEGER;
VAR res: INTEGER;
BEGIN
Bytes := Align(Bytes, 4);
res := _malloc(Bytes);
IF res # 0 THEN
zeromem(ASR(Bytes, 2), res)
END
RETURN res
END malloc;
PROCEDURE Free* (hMem: INTEGER): INTEGER;
BEGIN
free(hMem)
RETURN 0
END Free;
PROCEDURE _NEW*(size: INTEGER): INTEGER;
RETURN malloc(size)
END _NEW;
PROCEDURE _DISPOSE*(p: INTEGER): INTEGER;
RETURN Free(p)
END _DISPOSE;
PROCEDURE ConOut(str, length: INTEGER);
BEGIN
length := fwrite(str, length, 1, stdout)
END ConOut;
PROCEDURE DebugMsg* (lpText, lpCaption: INTEGER);
VAR eol: ARRAY 3 OF CHAR;
BEGIN
eol[0] := 0DX;
eol[1] := 0AX;
eol[2] := 00X;
ConOut(sys.ADR(eol), 2);
ConOut(lpCaption, strlen(lpCaption));
ConOut(sys.ADR(":"), 1);
ConOut(sys.ADR(eol), 2);
ConOut(lpText, strlen(lpText));
ConOut(sys.ADR(eol), 2);
END DebugMsg;
PROCEDURE ExitProcess* (code: INTEGER);
BEGIN
exit(code)
END ExitProcess;
PROCEDURE ExitThread* (code: INTEGER);
BEGIN
exit(code)
END ExitThread;
PROCEDURE GetProc(name: ARRAY OF CHAR; hMOD, adr: INTEGER);
VAR H: INTEGER;
BEGIN
H := dlsym(hMOD, sys.ADR(name[0]));
ASSERT(H # 0);
sys.PUT(adr, H);
END GetProc;
PROCEDURE init* (esp: INTEGER);
VAR lib, proc: INTEGER;
BEGIN
Param := esp;
sys.MOVE(Param + 12, sys.ADR(dlopen), 4);
sys.MOVE(Param + 16, sys.ADR(dlsym), 4);
sys.MOVE(Param + 20, sys.ADR(exit), 4);
sys.MOVE(Param + 24, sys.ADR(stdin), 4);
sys.MOVE(Param + 28, sys.ADR(stdout), 4);
sys.MOVE(Param + 32, sys.ADR(stderr), 4);
sys.MOVE(Param + 36, sys.ADR(_malloc), 4);
sys.MOVE(Param + 40, sys.ADR(free), 4);
sys.MOVE(Param + 44, sys.ADR(fopen), 4);
sys.MOVE(Param + 48, sys.ADR(fclose), 4);
sys.MOVE(Param + 52, sys.ADR(fwrite), 4);
sys.MOVE(Param + 56, sys.ADR(fread), 4);
sys.MOVE(Param + 60, sys.ADR(fseek), 4);
sys.MOVE(Param + 64, sys.ADR(ftell), 4);
lib := dlopen(sys.ADR("libc.so.6"), 1);
ASSERT(lib # 0);
GetProc("strncmp", lib, sys.ADR(strncmp));
GetProc("strlen", lib, sys.ADR(strlen));
lib := dlopen(sys.ADR("librt.so.1"), 1);
ASSERT(lib # 0);
GetProc("clock_gettime", lib, sys.ADR(clock_gettime));
END init;
END API.